<template>
<div>
  <a-card>
    <div id="pieChart_example"></div>
  </a-card>
</div>
</template>

<script>
export default {
  name: "PieChart",
  mounted() {
    this.myChart = this.$echarts.init(document.getElementById('pieChart_example'));
    this.myChart.setOption(this.option);
  },
  methods:{
    reSizePieChart(){
      this.myChart.resize();
    }
  },
  data(){
    return{
      //定义1个undefined对象，用来mounted初始化echarts
      myChart: undefined,
      option:{
        backgroundColor: '#2c343c',
        title: {
          text: 'Customized Pie',
          left: 'center',
          top: 20,
          textStyle: {
            color: '#ccc'
          }
        },
        tooltip: {
          trigger: 'item',
          formatter: '{a} <br/>{b} : {c} ({d}%)'
        },
        visualMap: {
          show: false,
          min: 80,
          max: 600,
          inRange: {
            colorLightness: [0, 1]
          }
        },
        series: [
          {
            name: '访问来源',
            type: 'pie',
            radius: '55%',
            center: ['50%', '50%'],
            data: [
              {value: 335, name: '直接访问'},
              {value: 310, name: '邮件营销'},
              {value: 274, name: '联盟广告'},
              {value: 235, name: '视频广告'},
              {value: 400, name: '搜索引擎'}
            ].sort(function (a, b) { return a.value - b.value; }),
            roseType: 'radius',
            label: {
              color: 'rgba(255, 255, 255, 0.3)'
            },
            labelLine: {
              lineStyle: {
                color: 'rgba(255, 255, 255, 0.3)'
              },
              smooth: 0.2,
              length: 10,
              length2: 20
            },
            itemStyle: {
              color: '#c23531',
              shadowBlur: 200,
              shadowColor: 'rgba(0, 0, 0, 0.5)'
            },

            animationType: 'scale',
            animationEasing: 'elasticOut',
            animationDelay: function (idx) {
              return Math.random() * 200;
            }
          }
        ]
      }
    }
  }
}
</script>

<style scoped>
#pieChart_example {
  margin: 0 auto;
  width: 100%;
  height: 500px;
  padding: 0;
  /*border: 1px solid red;*/
}
</style>